I think Fastenal would have a tough time loading that in a van.
Really, I doubt if they would accept it at all because of it's size.
As an aside, I averaged 20.88 MPG (actual) last week on a 400 mile round trip in my 56,000 mile 2015 Ram 3500 dually.
Deisel was $5.09/gal, deduct the 5%...